<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<div ng-app="myApp" ng-controller="personCtrl">
    名：<input type="text" ng-model="firstName"><br>
    姓：<input type="text" ng-model="lastName"><br>
    <br>
    姓名：{{ fullName() }}
</div>
<script>
    var app = angular.module('myApp',[]);
    app.controller('personCtrl',function ($scope) {
        $scope.firstName = "John";
        $scope.lastName = "Doe";
        $scope.fullName = function () {
            return $scope.firstName + " " + $scope.lastName;
        }
    })
</script>
</body>
</html>